首页|双蛋壳Ru纳米颗粒催化L-赖氨酸高效脱羧合成戊二胺

双蛋壳Ru纳米颗粒催化L-赖氨酸高效脱羧合成戊二胺

扫码查看
原文链接
  • 万方数据
  • 维普
戊二胺是生物基尼龙56的核心单体,以廉价且产能过剩的L-赖氨酸为原料,通过一步多相催化脱羧合成戊二胺,实现绿色高值化利用.L-赖氨酸脱羧需在强酸体系下进行,提高Ru基催化剂稳定性是共性科学难题之一.采用原位水热合成方法,设计制备双蛋壳包裹的钌催化剂,首先利用FAU孔道实现Ru纳米颗粒的高分散,其次在外层原位生长硅壳silicate-1(S-1),提高催化剂在酸体系下的稳定性.表征结果显示,双蛋壳包裹的Ru/FAU@S-1催化剂外层硅元素明显富集.在戊二胺合成反应中,Ru/FAU@S-1催化活性很高,L-赖氨酸转化率高达81.5％,戊二胺选择性65.8％,循环使用5次后催化效果无明显下降,催化剂稳定性得到显著改善.
Efficient decarboxylation of L-lysine to cadaverine over Ru nano particle encapsulated in two egg-shell
Cadaverine is a prime important monomer for development of bio-based nylon 56.The synthesis of cadaverine from low-cost and overcapacity L-lysine is a green and high-value pathway.Efficient and stable catalyst is the key to the chemo-catalytic heterogeneous process for cadaverine.In this work,high dispersion of Ru nanoparticles encapsulated in FAU was synthesized for high catalytic activity.Then,Ru/FAU@S-1 with a shell of the silicalite-1 was synthesized by in situ hydrothermal method to improve stability of catalyst in decarboxylation of L-lysine to cadaverine.In addition,the Ru/FAU encapsulated in all silicon shell had moderate acidity,which was beneficial for the decarboxylation of L-lysine to cadaverine.Finally,the conversion of L-lysine reached 81.5％,and the selectivity of cadaverine reached 65.8％.And,after 5 cycles,there was no significant decrease in catalytic performance of Ru/FAU@S-1.The stability of the catalyst was significantly improved.

fine chemical engineeringtwo-shell structuredruthenium nanoparticlescatalytic decarboxylationL-lysinebio-based cadaverine

辛宗武、马占玲、秦绍杰、黄玉红

展开 >

龙子湖新能源实验室,郑州中科新兴产业技术研究院,河南 郑州450000

中国科学院过程工程研究所,离子液体清洁过程北京市重点实验室,北京 海淀区100190

精细化学工程 双蛋壳包裹 钌纳米颗粒 催化脱羧 L-赖氨酸 戊二胺

国家自然科学基金项目国家自然科学基金项目河南省重点研发与推广专项(科技攻关)项目河南省重点研发与推广专项(科技攻关)项目中科豫能化绿色过程联合研发中心项目

2220832622078346232102231063231111232600ZKYN2022005

2024

10.3969/j.issn.1008-1143.2024.07.012

工业催化
西北化工研究院

工业催化

CSTPCD
影响因子：0.504
ISSN：1008-1143
年,卷(期)：2024.32(7)